#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>

void MAX_t(int* a, int* b)
{
	if (a == b)
	{
		return;
	}
	*a = *a ^ *b;
	*b = *a ^ *b;
	*a = *a ^ *b;
}
int main()
{
	int a = 10;
	int b = 20;

	MAX_t(&a, &b);
	printf("a=%d,b=%d", a, b);
}